In Turkey there are no large studies on the frequency of antibiotic associated diarrhea in children, but antibiotics are the most commonly used drug classes in childhood. The use of broad-spectrum antibiotics, which creates more risk than narrow-spectrum antibiotics, and the highest risk have been observed during use of clindamycin, cephalosporins and fluoroquinolones. However, there is no consensus about which antibiotics which are high risk or which have significant negative impact on the microbiota. Antibiotic-associated diarrhea, has been shown to increase the growth of enteropathogens after antibiotic use.